Re: Sexes
- From: NashtOn <nana@xxxxx>
- Date: Fri, 10 Mar 2006 20:50:36 GMT
John Wilkins wrote:
ceb_luv_lotr wrote:
Ok, I have a question.
How did sexes of animals and sexual relations between animals evolve?
Very slowly. At first there were probably just mating types among single
celled organisms similar to what we now see today.
Speculation. Wild guesses seem to be the hallmark of the
atheist/evo-cheerleader crowd.
Any experimental data to support this?
When colonial organisms
evolved, there was a specialisation of some cell types that allowed them to
propagate. Metazoans (multicellular animals) probably had a range of sex
determination mechanisms, some of which, for example, would be based on
population structure, as with fishes that can change sex when there are too
few males or females in the local deme. Some organisms like archosaurs (crocs
and alligators) determine sex by temperature of the local environment.
More speculation.
At no point was there no sex and then there was sex. Cellular and phenotypic
sex evolved so that no organism that reproduced was without some similar
enough organism to mate with if it needed to.
Even more speculation.
--
Nicolas
"The reason the theory of evolution is so controversial is that it is
the main scientific prop for scientific naturalism. Students first learn
that "evolution is a fact," and then they gradually learn more and more
about what that "fact" means. It means that all living things are the
product of mindless material forces such as chemical laws, natural
selection, and random variation. So God is totally out of the picture,
and humans (like everything else) are the accidental product of a
purposeless universe. Do you wonder why a lot of people suspect that
these claims go far beyond the available evidence?" Phillip E.Johnson,
The Church Of Darwin
.
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